diff --git a/addons/l10n_ch/migrations/11.1/post-migrate_update_taxes.py b/addons/l10n_ch/migrations/11.1/post-migrate_update_taxes.py
index 6b420315510..90d6585ef5e 100644
--- a/addons/l10n_ch/migrations/11.1/post-migrate_update_taxes.py
+++ b/addons/l10n_ch/migrations/11.1/post-migrate_update_taxes.py
@@ -5,4 +5,17 @@ from odoo import api, SUPERUSER_ID
 def migrate(cr, version):
     env = api.Environment(cr, SUPERUSER_ID, {})
     for company in env['res.company'].search([('chart_template', '=', 'ch')]):
+        # We had corrupted data, handle the correction so the tax update can proceed.
+        # See https://github.com/odoo/odoo/commit/7b07df873535446f97abc1de9176b9332de5cb07
+        taxes_to_check = (f'{company.id}_vat_purchase_81_reverse', f'{company.id}_vat_77_purchase_reverse')
+        tax_ids = env['ir.model.data'].search([
+            ('name', 'in', taxes_to_check),
+            ('model', '=', 'account.tax'),
+        ]).mapped('res_id')
+        for tax in env['account.tax'].browse(tax_ids).with_context(active_test=False):
+            for child in tax.children_tax_ids:
+                if child.type_tax_use not in ('none', tax.type_tax_use):
+                    # set the child to it's parent's value
+                    child.type_tax_use = tax.type_tax_use
+
         env['account.chart.template'].try_loading('ch', company)